Manufacture of artificial thread.



J. G. HARTOGS. MANUFACTURE OF ARTIFICIAL THREAD.

APPLICATION FILED JULY 26, 1911.

1,1 19,155; Patented Dec.1,1914.

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Minx Imp UNITED STATES PATENT OFFI E JACQUES COENRXAAD HARTOGS, OF AMSTERDAM, NETHERLANDS, ASSIGNOR TO N. V. NEDERLANDSCHE KUNSTZIJDEEAIBRIEK, F VOSDIJK ARNI'IEM, YIETHERLANDS,

INCORPORATED.

Application filed July 26, 1911.

To all whom it may concern Be it known that I, JAcQUEs COENRAAD HARTOGS, subject of the Queen of the Netherlands, residing at No. 15 Alexanderkade, Amsterdam, Province of North Holland, Netherlands, have invented certain new and useful Improvements in the Manufacture of Artificial Thread, of which the following is a specification.

This invention relates to a process for the manufacture of artificial thread and is especially suitable for the manufacture of artificial silk from cellulose or its derivatives or from solutions of casein, fibroin, viscose or the like.

In the manufacture of artificial thread especially artificial 'silk,. se"eral points must be considered, viz. the coagulation of the fluid, the fixing of the coagulated mass, the preservation of the softness of the finished thread and the prevention of the sticking I together of the separate threads. Hitherto it has been sought ,to effect these objects either by the use of a single bath fulfilling all the conditions or especially when spinhing artificial silk by the use of several baths. According to this invention I effect these four objects Without the use (if different vessels 'for the reception of the different liquids by the employment of different liquids which are little if at all miscible with each other. PreferablyI employ liquids'of difi'erent density which form superposed layers. For example threads of cellulose may first be coagulated in an aqueous fluid,

and then led in such a manner that the spun fibers do not touch each other for further treatment through a fluid of different density'such for example as benzene, oil, nitrobenzene, chloroform, carbon tetrachlorid, or the like, Where they receive a thin coating, which prevents them from sticking together Wheni they are combined into a thicker thread. If desired-the threads may again pass through the same aqueous layer and a liquid floating-r upon the aqueous'liquid.

also if desired through In the accompanying drawings Figures ,l, 2and 3 showdiagrammatically three methods of carrying out the invention: V

a is the vessel containing the viscous liquid and I) are its spinning nozzles from which separate threads 0 issue to be combined later into a single thread a.

I In- Fig. l d is anaqueous liquid such as a Specification of Letters Patent.

MANUFACTURE OF ARTIFICIAL THREAD. I

Serial No. 640,660.

dilute acid for example and e is a layer of Patented Dec. 1, 1914.

made of high specific gravity by dissolving in it some inert salt, glycerin or the like.

Its density may be decreased by admixture with .a suitable body such as alcohol, acetone or the like.

In Fig. 2, f is an aqueous liquid which coagulates the separate threads 0 issuing from the spinning nozzles b. g is a second heavier liquid such for example as nitrobenzene, chloroform, carbon tetrachlorid or the like lyingbeneath thelayer f through which the separate fibers pass. The fibers 0 may be combined into a single thread in this fluid in any suitable manner but preferably the threads are then reversed in direction by passing beneath a rod 7' (or other equivalent arrangement) located in the bottom of the vessel; they will in this case again pass through the aqueous liquid f thus preventing the threads from sticking together in consequence of the thin coating received by their passage through the liquid 9.

In Fig. 3 h is an aqueous liquid, 2' is a liquid heavier than k such as nitrobenzene, chloroform, carbon tetrachl orid or like heavy liquid, k is a liquid such as benzene,

spinning a good artificial silk from solutions of viscose in dilute sulfuric acid without other addition which has hitherto been impossible.

Theprocess may be. carried out in the apparatus shown in Fig. 1 the liquid d consisting of dilute sulfuric acid and the liquid 6 of an oil. The separate threads are after their. passage through the spinning bath d and the coating fluid e left for some time to themselves thus *allowing them to be thoroughly fixedwithout the possibility of their sticking together.

The coating of oil or the like can be removed from the threads for example by washing in a 1% soda solution or some or ganic solvent such as benzene. The product so obtained excels others heretofore proseparate filaments of dissolved cellulose issued through fine orifices by passing the, same through a decomposing solution whichv diiced.

What I claim is:

1. The process of making artificial thread in one bath, which comprises coagulating separate filaments of dissolved cellulose issued through fine orifices by passing the same through a decomposing solution which acts quickly on the cellulose solution, then coating the completely coagulated separate filaments to make them non-sticking by passing them through an indifferent liquid, then combining the coagulated non-sticking separate filaments into a thread.

2. The process of making artificial thread in one bath,.which comprises coagulating acts quickly on the cellulose solution, preventing the completely coagulated separate filaments from sticking by then passing them through a contacting layer of an m- I difi'erent liquid whereby a coating of said indifferent liquid envelops'the separate fila ments, then combining the coagulated coated filaments from sticking by then passing them through a contacting layer of an 1ndifl'erent liquid whereby a coating of said indi'fierent liquid envelops the separatefila-v ments, combining the coagulated coated separated filaments into a thread, then washing the thread.

In testimony whereof I have my hand in presenceof two subscribing witnesses.

' I JACQUES GOENRAAD HARTOGS. Witnesses: I

THOMAS H. VERHAVE, D. P. DE YOUNG.

hereunto set 

